. It is a rotary screening bucket suit for O&K RH1.15 excavators . Variable speed control mounted on the bucket enables the operator to set the optimum drum speed easily. . Rugged construction, using the best materials for long life and reliability. . Cross line relief valve for motor protection and drum overrun. . Interchangeable top plate for varying base machines. . Simple maintenance, heavy duty drive. . Drums are removed easily without special tools.